«If
crop yields go down 10, 20, 30 percent, that would have had an enormous impact across the world in terms of food security,» he said.
How could they show that drought lowers crop yield while
crop yields go up?
While genetically modified plants, fertilizers and pesticides have made
crop yields go a long way, the momentum sparked a couple of decades ago is steadily running out.
But then there are other components with competing potential outcomes — for instance, will a change of three degrees make
crop yields go up or down?
Wasn't there a recent paper that showed
crop yields went down with rising temperatures?
Not exact matches
And I mean as the delicious irony of this business, we're worried about what the
crop's
going to be this year and when it's
going to
yield and we're already talking about pricing for the spring of» 13.
If we doubled the atmospheric content of CO2, young pine trees would grow at twice the rate and nearly every
crop yield would
go up 30 to 40 %.
«We knew
going into this that organic agriculture is less productive in terms of
crop yields than conventional agriculture,» Crowder says.
«I was told it's not only
going to reduce the use of toxic chemicals, but
crops will fertilize themselves, produce high
yields and make famine a thing of the past because the
crops will be resistant to stress, cold, drought and heat.
In 1985, Vietnam achieved self - sufficiency in rice and then
went on to continue to increase its production due to supportive government policies, and its adoption of better
crop management strategies and new high -
yielding rice varieties.
But the study
went a step further, comparing
crop yields on conventional farms to those on organic farms where cover
crops were planted and
crops were rotated to build soil health.
Higher
yields and more
crops grown in the same area of land means fewer minerals from the soil
go to each plant.
Sell this to the farmer where if you could quantify every factor that
goes into growing a
crop for a year you could predict the
crop yield for the Average effective farmer.
An ever - expanding global population will require an increase in food production and
crop yields, and that is only
going to be possible through higher fertilizer use in agriculture.
A sales person persuades you as a farmer to buy Monsanto seeds, either because the
crop yield is
going to be better, availability of your normal seed is not there or 101 other good reasons.
Conversely, other impacts, such as declining
crop yields in the United States, might not happen until we
go above the threshold.
Since estimated CO2 levels in 1900 (290 ppmv) were not that much higher than those in pre-industrial times (280 ppmv), one could roughly estimate that
going back to pre-industrial CO2 levels would result in an equivalent reduction in
crop yields.
As 20th century temperatures have risen,
crop yields have
gone up.
If we are
going to use waste oils and existing high oil -
yielding crops (grown sustainably), then yes.
Almost all of this derives from corn, with one bushel of corn
yielding about 2.7 gallons of ethanol and about 28 % of the U.S. corn
crop going toward ethanol production.
As bee populations dwindle,
crop yields also decrease, and it's only
going to get worse if we don't act.
If we doubled the atmospheric content of CO2, young pine trees would grow at twice the rate and nearly every
crop yield would
go up 30 to 40 %.
Project leader, Mburu Waiganjo told us «What makes me personally proud is the fact that our project has reversed a forest degradation trend and the «don't care» attitude towards the forest conservation that had prevailed has now
gone and
yielded the current lush green forest that is teeming with wildlife noises from the birds, the beauty of the butterflies and other insects which are evidently useful in pollination of
crops in the forest - adjacent farms.
As far as
crops go, the problem is this: Changes to the hydrological cycle as a result of global warming may be neutral on a 100 - year timescale, as far as
crop yields are concerned.
C / If global temperatures decline and through stupidity after some way is found to limit and reduce CO2, global CO2 levels are reduced through the efforts of activist climate science establishment then the world will
go hungry as the world's farmers will not be able to grow enough food as both
yields and
cropped area are reduced due to cooler or colder temperatures and reduced amounts of that essential plant food, CO2 other wise known as that planet destroying «carbon».
Crop yields would
go down by a lot more than 40 % in that scenario, too.
When it comes to climate change science it seems like each new week brings a fresh study showing how much
crop yields are
going to decline, how much less water many places are
going to have, how quickly sea level rise is
going to happen, how many more infectious diseases are
going to spread, et cetera, et cetera.
A lot of hungry animals will be
going after any such heat - tolerant
crop plants, as wildland
yields get impacted by climate.
Whether for enhancing
crop yields or storing massive amounts of carbon in the soil as part of a geoengineering plan, biochar certainly has a bit of a buzz
going around it of late.
Are we
going to get hail, what effect could this storm have upon my
crop yield.